Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 41)

5. Replace the front-panel I/O board (see " Replacing the Front-Panel I/O Board ").
6. Replace the control-panel cable cover (see " Replacing the Control-Panel Cable Cover ").
System Fans
The system includes the following hot-pluggable cooling fans:
Two system fans
One expansion-card fan
One microprocessor fan for each installed microprocessor
The system may also include other optional hot-pluggable fans.
Removing a Cooling Fan
NOTE: The procedure for removing each individual fan is the same.
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System
Information document.
NOTICE: The cooling fans are hot-pluggable. To maintain proper cooling while the system is on, replace only one fan
at a time.
1. Remove the cover (see " Removing the Cover ").
2. Pull the fan straight up to clear the chassis (see Figure 4-8 ).
Figure 4-8. Removing and Installing a Cooling Fan
Replacing a Cooling Fan